======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '171'
                                          'artist'  'Frank Sinatra'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "191 I couldn't sleep a wink last night - Frank Sinatra (12-02-1944)"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['easy listening', 'jazz', 'vocal jazz', 'oldies', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '191'
                                      'tracktotal'  ''
                                            'date'  '1944'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '138.040'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'TBPM' (BPM (beats per minute))                     '138.040'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1944'
'TIT2' (Title/songname/content description)         "191 I couldn't sleep a wink last night - Frank Sinatra (12-02-1944)"
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Frank Sinatra'
'TRCK' (Track number/Position in set)               '191'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['easy listening', 'jazz', 'vocal jazz', 'oldies', 'swing']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.80 dB'
'TXXX:replaygain_track_peak'                        '0.366851'

========================== row from database ==========================
                                              'id'  1502942
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1943/191 I couldn_t sleep a wink last night - Frank Sinatra (12-02-1944).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  171
                                           'genre'  prerock-swing
                                        'filesize'  2745179
                                           'mtime'  1620561854
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1943 couldn_t prerock swing
                                      'tag_artist'  Frank Sinatra
                                     'tag_release'  None
                                       'tag_title'  191 I couldn't sleep a wink last night - Frank Sinatra (12-02-1944)
                                             'bpm'  138.04
                                    'search_title'  '02':14 '12':13 '12021944':16 '191':1 '1944':15 'a':7 'couldn':3 'couldnt':5 'frank':11 'i':2 'last':9 'night':10 'sinatra':12 'sleep':6 't':4 'wink':8
                                   'search_artist'  'frank':1 'sinatra':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1943':6 'couldn':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9 'swing':10 't':8
                                    'search_combo'  '00oldiepop':23 '02':14A '12':13A '12021944':16A '191':1A '1943':24 '1944':15A 'a':7A 'couldn':3A,25 'couldnt':5A 'country':22 'exotica':20 'frank':11A,17B 'i':2A 'jazz':19 'last':9A 'night':10A 'oldies':21 'prerock':27 'sinatra':12A,18B 'sleep':6A 'swing':28 't':4A,26 'wink':8A
                                    'tag_tracknum'  191
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['easy listening', 'jazz', 'vocal jazz', 'oldies', 'swing']
                                        'tag_date'  1944
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620561853.8449259  (2021-05-09 14:04:13)
                             'size'  2745179